7 entries under unsound topic. ×

20
unrealistic(adjective, practical, fantasy, ideal)
8
unreasonable(adjective, correct, right, representation)
7
irrational(adjective, sound, rational, representation)
6
fanciful(adjective, unreality, impracticability, irreality)
5
insincere(adjective, unreality, impracticability, irreality)
5
inefficient(adjective, unreality, impracticability, irreality)
5
unwise(adjective, unreality, impracticability, irreality)
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APASmart Define. (2016). realistic thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/realistic/thesaurus/antonyms
ChicagoSmart Define. 2016. "realistic thesaurus" https://smartdefine.org/realistic/thesaurus/antonyms (accessed September 30, 2026).
HarvardSmart Define 2016, realistic thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/realistic/thesaurus/antonyms>.
MLASmart Define. "realistic thesaurus" 31 March 2016. Web. 30 September 2026. <https://smartdefine.org/realistic/thesaurus/antonyms>